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Crying helps relieve stress
William H. Frey II, Ph.D., a professor of pharmaceutics at the University of Minnesota and co-director of the Alzheimer's Research Center at Regions Hospital in St. Paul also made his study participants cry by showing sad movies. His theory was that we feel better after crying because it removes chemicals that build up during stress. “We don’t know what those chemicals are, but we do know that tears contain ACTH, which is known to be increased in stress. We don’t know if they are increased in tears,” reports Frey.
Frey continues, “It’s important that we evolved this ability. If you can alleviate stress, you can prevent stress damage to the heart and brain and improve long-term survival. We shouldn’t be conditioning young children not to cry; we should be happy that they have the ability.”